GH-423 Cache cwd and send the change event as a callback

NeoVimServer/NeoVimMsgIds.h

@@ -36,6 +36,7 @@ typedef NS_ENUM(NSUInteger, NeoVimServerMsgId) {
     NeoVimServerMsgIdStop,
 
     NeoVimServerMsgIdDirtyStatusChanged,
+    NeoVimServerMsgIdCwdChanged,
     NeoVimServerMsgIdAutoCommandEvent,
 
 #ifdef DEBUG

NeoVimServer/server_ui.m

@@ -128,6 +128,20 @@ static void send_dirty_status() {
   [data release];
 }
 
+static void send_cwd() {
+  char_u *temp = xmalloc(MAXPATHL);
+  if (os_dirname(temp, MAXPATHL) == FAIL) {
+    xfree(temp);
+    [_neovim_server sendMessageWithId:NeoVimServerMsgIdCwdChanged];
+  }
+
+  NSString *pwd = [NSString stringWithCString:(const char *) temp encoding:NSUTF8StringEncoding];
+  xfree(temp);
+
+  NSData *resultData = [pwd dataUsingEncoding:NSUTF8StringEncoding];
+  [_neovim_server sendMessageWithId:NeoVimServerMsgIdCwdChanged data:resultData];
+}
+
 static void insert_marked_text(NSString *markedText) {
   _marked_text = [markedText retain]; // release when the final text is input in -vimInput
 
@@ -490,6 +504,11 @@ void custom_ui_autocmds_groups(
   @autoreleasepool {
     DLOG("got event %d for file %s in group %d.", event, fname, group);
 
+    if (event == EVENT_DIRCHANGED) {
+      send_cwd();
+      return;
+    }
+
     if (event == EVENT_TEXTCHANGED
       || event == EVENT_TEXTCHANGEDI
       || event == EVENT_BUFWRITEPOST

SwiftNeoVim/NeoVimAgent.m

@@ -604,6 +604,15 @@ static CFDataRef local_server_callback(CFMessagePortRef local, SInt32 msgid, CFD
       return;
     }
 
+    case NeoVimServerMsgIdCwdChanged: {
+      if (data == nil) {
+        return;
+      }
+
+      [_bridge cwdChanged:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+      return;
+    }
+
     case NeoVimServerMsgIdAutoCommandEvent: {
       if (data.length == sizeof(NSUInteger) + sizeof(NSInteger)) {
         NSUInteger *values = (NSUInteger *) data.bytes;

SwiftNeoVim/NeoVimUiBridgeProtocol.h

@@ -128,6 +128,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)setTitle:(NSString *)title;
 - (void)setIcon:(NSString *)icon;
 - (void)setDirtyStatus:(bool)dirty;
+- (void)cwdChanged:(NSString *)cwd;
 - (void)autoCommandEvent:(NeoVimAutoCommandEvent)event bufferHandle:(NSInteger)bufferHandle;
 
 /**

SwiftNeoVim/NeoVimView+UiBridge.swift

@@ -201,10 +201,6 @@ extension NeoVimView {
         self.tabChanged()
       }
 
-      if event == .DIRCHANGED {
-        self.cwdChanged()
-      }
-
       if event == .BUFREADPOST || event == .BUFWRITEPOST {
         self.currentBufferChanged(bufferHandle)
       }
@@ -238,6 +234,15 @@ extension NeoVimView {
     }
   }
 
+  public func cwdChanged(_ cwd: String) {
+    gui.async {
+      self.bridgeLogger.debug(cwd)
+
+      self._cwd = URL(fileURLWithPath: cwd)
+      self.cwdChanged()
+    }
+  }
+
   public func setDirtyStatus(_ dirty: Bool) {
     gui.async {
       self.bridgeLogger.debug(dirty)

SwiftNeoVim/NeoVimView.swift

@@ -80,7 +80,7 @@ public class NeoVimView: NSView,
 
   public var cwd: URL {
     get {
-      return self.agent.pwd()
+      return self._cwd
     }
 
     set {
@@ -184,6 +184,7 @@ public class NeoVimView: NSView,
   var currentEmoji = "😎"
 
   var _font = NeoVimView.defaultFont
+  var _cwd = URL(fileURLWithPath: NSHomeDirectory())
   var shouldDrawCursor = false
 
   // MARK: - Private

VimR/MainWindow.swift

@@ -187,9 +187,9 @@ class MainWindow: NSObject,
 
           self.windowController.setDocumentEdited(state.isDirty)
 
-          if self.neoVimView.cwd != state.cwd {
+//          if self.neoVimView.cwd != state.cwd {
-            self.neoVimView.cwd = state.cwd
+//            self.neoVimView.cwd = state.cwd
-          }
+//          }
 
           if state.previewTool.isReverseSearchAutomatically
              && state.preview.previewPosition.hasDifferentMark(as: self.previewPosition)
@@ -227,9 +227,9 @@ class MainWindow: NSObject,
 
     self.updateNeoVimAppearance()
     self.neoVimView.delegate = self
-    if self.neoVimView.cwd != state.cwd {
+//    if self.neoVimView.cwd != state.cwd {
-      self.neoVimView.cwd = state.cwd
+//      self.neoVimView.cwd = state.cwd
-    }
+//    }
 
     self.open(urls: state.urlsToOpen)
 
@@ -444,9 +444,9 @@ extension MainWindow {
       let urls = panel.urls
       if self.neoVimView.allBuffers().count == 1 {
         let isTransient = self.neoVimView.allBuffers().first?.isTransient ?? false
-        if isTransient {
+//        if isTransient {
-          self.neoVimView.cwd = FileUtils.commonParent(of: urls)
+//          self.neoVimView.cwd = FileUtils.commonParent(of: urls)
-        }
+//        }
       }
       self.neoVimView.open(urls: urls)
     }